Support stand



FIG. 1 is an isometric view of a support stand showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image thereof:

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is an auxiliary view thereof, the same being taken along the plane 5-5 of FIG. 3.

The broken lines showing is included for the purpose of illustrating environment of the design only and forms no part of the claimed design. 

CLAIM The ornamental design for a support stand, as shown and described. 